Picture-exhibitor.



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UNITED STATES PatentedJuly 14, 1903.

PATENT 'OFFICE.

PICTURE-EXHIBITOR.

$PECIFIGATION forming part of Letters Patent No. 733,802, dated July 14,1903.

Application filed May 23, 1903. Serial 158,483. (No model.)

To all whom it may concern.-

Be it known that I, ULYSSES L. BERGER, a citizen of the United States,residingat Washington, in the District of Columbia, have made certainnew and useful Improvements in Picture-Exhibitors, of which thefollowing is a specification.

My invention is an improved apparatus for viewing pictures which are inthe nature of transparencies, the pictures proper being applied to glassplates or to translucent paper held duly stretched in a suitable frame.

The invention is embodied in certain features of construction,arrangement, and combination of parts, as hereinafter described, andillustrated in the accompanying drawings, in which-- Figure 1 is a planview of the apparatus, the cover of the box or body of the instrumentbeing removed and the picture guide and support being shown extendedlaterally. Fig. 2 is a central vertical longitudinal section of theapparatus on line 2 2 of Fig.1. Fig. 3 isa cross-section on the line 3 3of Fig. 1.

The body of the instrument is an oblong reotangular box 1, which isconstructed of some thin, light, and cheap material, preferably The boxis provided near the end 2 with two transverse vertical partitions 3 and4. The said partitions are separated by a narrow space and arrangedparallel, so as to serve as guides for a picture support and guide 5.The latter is for-med of thin sheet metal, its lower end being bentupward, as

shown in Fig. 2, to form a guide for the picture as. The picture-support5 is adapted to slide through a slot formed in the side ofihe box andbetween the partitions 3 and 4. It is prevented from being wholly drawnfrom the box by means of a tongue 6, which projects through a horizontalslot 7 in partition '3. A tube 8 extends from the partition 4 throughthe right-hand end 2 of the box 1 and a slight distance beyond the same.This tube is supported by the said partition and the end of the bOX andis fixed in position. (See Fig. 1.) A shorter extension-tube 8 isadapted to slide in the fixed tube 8. In Fig. 1 the extension 8 is showndrawn out by dotted lines and in Fig. 2 the same is closed or pushed in.A lens 10 is adapted to slide in the fixed tube 8, and for adjusting itit is provided with an arm 11, that extends laterally through a sideslot 12, arranged longitudinally in-theside of the box. The outer end ofsaid arm is provided with a thumb-piece 11 for convenience of use inadjusting the lens toward or from the pictureac. A curved lever 13 ispivoted upon a bracket or other suitable support 14 within the box andadapted toswing in a horizontal plane. Its longer arm projects throughcoincident slots in the partitions 3 and 4, and when a picture a: isintroduced it presses against or rests in contact with the lever, asillustrated in Fig. l. The

arm 11, carrying the lens, as before described,

is provided with a vertical pin or stud 15,

"(see Fig. 1,) which is adapted to work in con tact with the lever, aswill bepresently described. I

The manner of using the instrument is as follows: The picture guide andsupport 5 is first drawn out, as shown in Fig. 1. The picture'is thenlaid therein in vertical posi tion and slid horizontally into the spacebetween the two partitions 3 and 4 until it reaches the positionindicated in Fig. 1, the inner edge of the same being then in contactwith the longer arm of the lever, as also indicated in Fig. 2. Theslidable tube 8 may then be adjusted as required. The end 2 of the boxbeing then held to the light, the picture may be viewed through thecoincident tubes 8 and 8*, since the light necessary for dueillumination of the transparency will be admitted through the opening 1in the end of the box and through the coincident openings in thepartitions 3- and 4. The lens 10 will be adjusted, by means of theattachment 11 11", toward or from'the picture for the purpose ofsecuring the desired optical efiect, by A which the picture is made toappear to the best advantage. By sliding the lens back and forth in thetube 8 the opticaleffect may be changed at will, the figure or figuresupon the transparency being thus enlarged or' diminished in sizecorrespondingly.

noted that the lens may be slid between the bracket14, on which thelever 13 is pivoted, and the nearest partition 4 without afiecting theposition of the lever or the picture 00; but when the lens is movedfarther back its stud 15 will strike the'shorter and more abruptly- Itwill be ICO curved arm of the lever 13, so that the latter will beshifted on its pivot, with the result that the picture or will be pushedlaterally outward in the guide-support 5, so that it will passcompletely out of the range of vision of the person looking through thetube. It will be understood that this result is obtained when the leverand lens have reached the position indicated by dotted lines, Fig. 1.Thus the efiect of a moving panorama or picture may be obtained by thesimple manipulation of the lens-to wit, its adjustment in the tube 8-andthe operation may be repeated as often as desired by pushing the picture00 back to its original position (indicated by full lines, Fig. 1) andalso adjusting the lens so that the stud or pin 15 is forward of thepivot of the lever. It will be seen that the apparatus is thus in thenature of a scientific toy, affording both instruction and amusement inan optical way.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. Theimproved picture-exhibitorcomprising the box having longitudinaland vertical side slots, transverse partitions provided with openings, afixed and longitudinally-slotted tube arranged at right angles to saidpartitions and extending through the box, a picture guide and supportadapted to slide between the said partitions, a lens havingalateral armand adapted to slide in the aforesaid tube, and a lever pivoted withinthe box and arranged as described for engagement with the picture andthe arm of the lens, substantially as described.

2. Theimproved picture-exhibitorcomprising a box having transversepartitions provided with central openings and a fixed tube arrangedcoincidently with said openings and provided with a lengthwise slot, alens adapted to slide in the said tube and provided with a lateral armfor adjusting it as required, and a picture support and guide which isadapted to slide between said partitions and to be extended from the boxlaterally, substantially as shown and described.

3. Theimproved picture-exhibitor comprising the box, a tube arrangedlongitudinally therein and provided with a lengthwise slot, a lensadapted to slide in said tube, and a lateral arm connected therewith andadapted to slide in a lengthwise slot provided in the side of the box,and a laterally-slidable picture guide and support arranged and adaptedto work in a lateral, vertical slot of the.box, substantially asdescribed.

4. In a picture-exhibitor, the combination, with the box having asuitable picture guide and support within the same, of a lever pivotedwithin the box and arranged for contact with the picture when introducedin the manner described, and means for adjusting said lever for thepurpose of moving the picture across the field of vision, substantiallyas shown and described.

5. The improved picture-exhibitor, comprising the box having suitabletransverse guides for a picture, and a longitudinal tube provided with alengthwise slot, a lever pivoted within the tube and one of its armsprojecting into the path of the picture, the lever being so curved thatthe other arm projects across the tube, and a device which is movablelongitudinally of the box and provided with a projection adapted to workin contact with the lever, whereby the latter may be shifted in positionfor moving the picture in the manner described.

6. Theimproved picture-exhibitorcomprising a suitable box having alateral slot and interior guides for receiving and supporting a picture,a lengthwise tube which is slotted as described, a curved lever pivotedwithin the box and projecting across the pathway of the picture and alsoacross the tube, a lens which is slidable in the tube and provided witha lateral arm having a vertical projection adapted to work in contactwith the lever, whereby, when the lens is adjusted away from thepicture, the lever is shifted and the picture moved across the field ofvision in the manner described.

7. In a picture-exhibitor, the combination, with the box having avertical side slot and a transverse partition arranged adjacently, of apicture guide and support adapted to slide in said slot and having atongue projecting through a horizontal slot in the said partition andserving as a stop and support for the picture-guide in the mannerdescribed.

ULYSSES L. BERGER.

Witnesses:

Amos W. HART, SoLoN O. KEMON.

